In the context of climate variation and land use/cover change (LUCC), terrestrial ecosystem has substantially changed over the past few decades, which can be reflected by the variations in net primary productivity (NPP). The Tumen River Basin (TTRB), the center of Northeast Asia, was selected as the study site. On the basis of long-term series of normalized difference vegetation index (NDVI) data sets accompanied with a developed product of meteorological data, the optimized Carnegie Ames Stanford Approach (CASA) model and other common statistical methods as well as the approach of transition matrix were utilized to reveal the spatio-temporal changes of NPP and the effects of climate variation and LUCC on NPP from 1982 to 2012 in TTRB. The results indicated that throughout the past 31 years NPP exhibited a general upward trend on both spatial and temporal levels whereas the spatial downward trend accounting for 38% of the area and obvious fluctuations in the temporal trend plot of NPP variability collectively connoted the partial degradation of ecosystem in TTRB. The correlation analysis between NPP and climatic factors at spatial and temporal scales revealed that temperature affected local NPP greater than precipitation. The quantitative evaluation for the impact of LUCC on NPP underscored that national ecological policies were largely effective in the restoration of ecosystem. The more prominent role of climate variation on NPP than LUCC indicated that the new ecological strategy should pay more attention to the relations between NPP and climatic variables. Simultaneously, assistant measures should be added to form a holistic management scheme for the ecosystem in TTRB.

在气候变化和土地利用/覆盖变化（LUCC）的背景下，陆地生态系统在过去几十年中发生了重大变化，这可以通过净初级生产力（NPP）的变化来反映。东北亚中心的图们江流域（TTRB）被选为研究地点。基于长期系列的归一化植被指数（NDVI）数据集和成熟的气象数据产品，优化的卡内基艾姆斯斯坦福方法（CASA）模型和其他常用统计方法以及过渡矩阵方法用于揭示 TTRB 1982 年至 2012 年 NPP 的时空变化以及气候变化和 LUCC 对 NPP 的影响。结果表明，在过去 31 年中，NPP 在空间和时间层面均呈现总体上升趋势，而占面积 38% 的空间呈下降趋势，且 NPP 变率时间趋势图波动明显，共同意味着部分退化。 TTRB 中的生态系统。NPP与气候因子在时空尺度上的相关性分析表明，温度对局地NPP的影响大于降水。LUCC 对 NPP 影响的定量评价强调了国家生态政策在生态系统恢复方面的有效性。气候变化对 NPP 的作用比 LUCC 更为突出，表明新的生态战略应更加关注 NPP 与气候变量之间的关系。同时，